Seed priming with co-aggregated Azospirillum and Methylobacterium cells reduce the bacterial fruit blotch incidence in watermelon
Abstract Microbial inoculants are increasingly vital in the plant growth-promotion and disease management of important agricultural crops. The possibility of co-aggregated Azospirillum sp. (CW903) and Methylobacterium sp. (CBMB110) as a biocontrol approach to combat watermelon blotch disease was inv...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-08-01
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| Series: | Applied Biological Chemistry |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s13765-025-01027-4 |
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| Summary: | Abstract Microbial inoculants are increasingly vital in the plant growth-promotion and disease management of important agricultural crops. The possibility of co-aggregated Azospirillum sp. (CW903) and Methylobacterium sp. (CBMB110) as a biocontrol approach to combat watermelon blotch disease was investigated in this study. In survivability assays, co-aggregated CW903 outperformed CBMB110 in the watermelon soil. The co-inoculation using CBMB110 and CW903 in the co-aggregated form drastically reduced the number of Acidovorax citrulli on watermelon leaves and lowered the lesion areas by 42%. Various physiological and biochemical parameters such as phenol concentration, ethylene emission, and trans-cinnamic acid, were significantly decreased by the co-inoculation. Significant decreases were also observed in electrolyte leakage, H₂O₂ concentration, β-1,3-glucanase activity, phenylalanine ammonia-lyase (PAL) activity, peroxidase (POD), and polyphenol oxidase (PPO) activity. Co-aggregated cells enhanced disease suppression efficiency, and significantly reduced the severity of seedling blight by 21% and leaf spot by 35%. |
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| ISSN: | 2468-0842 |